eng URI http://hdl.handle.net/10795/3095 ασύρματη τηλεπικοινωνία In this work, we investigate the influence of the group velocity dispersion effect along with the atmospheric turbulence on the performance of a terrestrial free space optical communication system which is using the atmosphere as propagation path. We assume that the examined wireless optical link employs longitudinal Gaussian pulses in order to transmit the information signal from the nonlinear laser diode of the transmitter to receiver’s photo detector. The atmospheric conditions are modelled through the negative exponential distribution model, which is a very accurate model for the signal’s irradiance estimation over strong turbulence conditions. Thus, taking into account these effects we obtain closed form mathematical expressions of the probability of fade of the link. Additionally, we evaluate specific parameters, such as the chirp, which can reduce the probability of fade and as a result they can improve the optical system’s characteristics. The influence of the time dispersion effect on chirped pulse’s propagation is further investigated. Finally, by using the derived mathematical expressions, we present several numerical results which demonstrate our suggestions for the improvement of the system’s performance 11 pp. LOMv1.0 creator LOMv1.0 Project Deliverable Number D.2.3.5 LOMv1.0 Project Final Beneficiary LOMv1.0 Project Executing Organisation 2014-05-31 Digital Library of the Operational Programme "Education and Lifelong Learning" abstract types Text Terrestrial Free Space Optical Communication System Longitudinal Gaussian Pulses Negative Exponential Distribution Time Dispersion Atmospheric Turbulence Probability of Fade 377060 application/pdf http://repository.edulll.gr/edulll/bitstream/10795/3095/2/3095_D2.3.5.pdf URI http://hdl.handle.net/10795/3095 LOMv1.0creator 2016-05-10T12:45:20Z LOMv1.0validator 2016-05-10T12:45:20Z LOMv1.0 gre no no Copyright EYD-EPEDBM (Operational Programme "Education and Lifelong Learning")